Allen t



(No Model.)

A. T. MILLER.

VALVE FOR MOTORS.

No. 545,368. Patented Aug. 27, 1895.

lhvrrnn 'rnrns ATENT rrrca.

ALLEN T. MILLER, OF DAYTON, OHIO, ASSIGNOR TO KUIINS BROTHERS, OF SAMEPLACE.

VALVE FOR MOTORS.

SPECIFICATION forming part of Letters Patent No. 545,868, dated August27, 1895. Application filed March 21,1895. Serial No.542,669. (Nomodel.)

To all whom it may concern: represents a similar port on the oppositeside lie it known that I, ALLEN T. MILLER, reof the valve G. siding atDayton, in the county ofMontgom- H represents the auxiliary valve gainedon cry and State of Ohio, have invented certain the piston-neck h andprovided with two 5 5 new and useful Improvements in Valves for seatswhich cover and uncover, respectively,

Motors, of which the following is a specificaports m m which ports areto admit pressure tion. medium into the cylinder E for moving the Myinvention relates to valves for motors; duplex piston D D in the properdirection, and it consists in the construction and combiaccording to thethrow of the auxiliary valve. 60

I to nation of parts as hereinafter described and Said auxiliary valveis provided with a tripclaimed. ping device constructed as follows:

The several features of my invention will I represents a shaftreciprocating in the be more fully set forth in the description ofhearing-box J and likewise jonrnaled in the the accompanying drawings,making a part stuffing-box J in one of the cylinder-heads 65 of thisspecification, in which K. Said shaft is provided with a finger L,

Figure l is a central vertical section of my which projects over intothe recess 2 on. the improved motor in position for use. Fig. 2 top ofthe valve H and engages with the is a central crosssection on line m m,Fig. 1. flanges at either end. Said shaft I is oper- Fig. 3 is a bottomplan view of the main ated by the rock-lever H, which is operated 7ovalve. Fig. 4 is a top plan view of the same. by the piston-rod O in thefollowing manner:

Fig. 5 is an enlarged top plan view of the 70 represents a disk keyedupon said pistonauxiliary valve. Fig. 6 is an enlarged bottom rod andadapted to engage at each end of the plan view of the same. Fig. 7isaperspective stroke with the puppets p 19 secured to the .view of thetripping-finger and shaft. Fig. rod P, which is journaled in thebrackets r. 7 5

Sis a modified form of main valve. The rock-lever M is pivoted to theboss of A represents the cylinder of the motor; B, the puppet p, and asthe piston-rod C recipthe piston operated in said cylinder; 0, therocates it strikes the said puppets alternately piston-rod. and throwsthe rock-lever M, which reciproa represents one of the supply-ports; a,the cates the shaft I which carries the finger L, 8:)

port for operating on the other face of the and throws the auxiliaryvalve H in either piston. direction, covering and uncovering, ports m Z2represents the exhaust-port connected alm, as the case may be. As shownin Fig. 1, ternately with ports a a, voiding water or the port m isopen. The force of the pressother pressure medium into the chamber 0.ure medium which drives the main piston 85 5 D D represent the duplexpiston reciproholds the duplex piston D D in the position eating in thecylinder E. F represents the shown. Said medium is supplied throughsupply-pipe tapping said cylinder. the port a, thence. through port oronto the G represents the main valve, provided with piston B, which willpropel it forward. The cut-off sections adapted to respectively covervalves remain in this position until the disk 90 and uncover theportsaa. cl representsadis- K has struck the puppet p, which will throwcharge-port connecting either of said ports the auxiliary valve in theopposite direction, with the exhaust-port I). Said valve is of closingport m and uncovering portm', which curved form, fitting the face of thecylinder will admit the medium of force to the duplex E. Said valve isprovided with an annular piston D, which will force the said piston 95flange 'i, fitting and seating in the tubular hack in the cylinder E,carrying with it the flange 51', formed on the shank or neck 77. of themain Valve G, which covers port a, and adpis'ton D. mitting the mediumthrough the port 0. onto 2 represents a port formed outside of the theopposite face of the piston for driving flange j and receiving itspressure'supply the motor in the reverse direction. The ex- 10a from theinlet F through the passages e behaust is alternately through thesupply-ports tween the cylinder walls and the neck 77.. e and throughthe port cl of the main valve and port I) in the cylinder toexhaust-chamber'c. The exhaust from the cylinder E, when the piston D Dis thrown, is through the ports m m alternately with the port at of theauxiliary valve, thence by port 0, which communicates with the port d ofthe main valve, and thence with the exhaust-chamber. It will be observedthat the neck of the piston D D carries the main valve and piston D D,reciprocates in the cylinder E, and sustains the thrusts and wear causedby the change of the stroke. The main and auxiliary valves, it will beobserved, are practically balanced and may be moved easily. The exhaustports and passages are made so as to cushion the movement of the pistonby the resistance of the exhaust through the passages.

In the modification shown in Fig. 8 the main valve is provided with anannular stein tseating on the annular boss 7.) on the neck of the pistonD D, which holds the main valve firmly in position laterally but yetallows it to drop down as it wears away, so as to keep its contact withthe seat, and the pressure being sufficient to hold it in its seat.Likewise the auxiliary valve H, while being practically balanced, has aslight excess of pressure on its top side to hold it to its seat.

It will be observed that the ends of the duplex piston D D are connectedby a neck or shank, around which the pressure medium passes, to supplythe ports Ct to and m m, respectively. The said piston has itsbearingsupport. in cylinder E and but little Wear is brought upon themain and cut-oft" valves, While the piston D D is practically balancedin the cylinder E.

I claim The combination with a motor cylinder and its ports and piston,the auxiliary cylinder E, and the duplex piston D D having its endsconnected by a neck It provided on the under side with an annularflange, of the main valve G having an annular flange engaged with thecorresponding flange of the said piston neck and provided with a centraldischarge port and with ports 6 e at its ends, and the auxiliary valve Hseated upon the upper side of the piston neck 71., substantially asdescribed.

In testimony whereof I have hereunto set my hand.

ALLEN T. MILLER.

Witnesses:

DANIEL Mnvnvs, G. FRANK KUHNS.

